10/05/2007 @ 7:00PM

In Pictures: The World's Oldest Billionaires

John Simplot

Idaho’s premier potato man supplies the spuds for the bulk of McDonald’s french fries. Simplot was also an original investor in Micron Technology; his holdings in the firm are worth some $200 million.

Note: Ages current as of Oct. 2007. Valuations of the U.S. members of the list are from the Forbes 400, published in Sept. 2007. The valuations for non-U.S. billionaires are as of March 2007, when we compiled them for our annual list of the world’s billionaires.